engineering recuitment UPCL AE (E&M) 2021 Mock Test Power Systems Circuit Breakers Ratings of Circuit Breakers
A three-phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is
1
1200 A
2
3600 A
3
35 kA
4
104.8 kA